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#1 2007-10-07 22:21:42
- simone
- Member
- Registered: 2007-10-05
- Posts: 19
absolute value notation
hello, I'm confused about the solution to this expression for x<0 :
sqrt(-x|x|)=
I know that for x<0 I get sqrt(x^2)
but then to me both x and -x are solutions.
could you explain what I'm doing wrong so I won't make the same mistake?
thank you!
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#2 2007-10-07 22:54:01
- JaneFairfax
- Member
- Registered: 2007-02-23
- Posts: 6,868
Re: absolute value notation
Last edited by JaneFairfax (2007-10-07 22:58:57)
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#3 2007-10-08 02:40:40
- simone
- Member
- Registered: 2007-10-05
- Posts: 19
Re: absolute value notation
thank you Jane!
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